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physics

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A man pulls a crate of mass 61.0 kg across a level floor. He pulls with a force of 178.0 N at an angle of 20.0� above the horizontal. When the crate is moving, the frictional force between the floor and the crate has a magnitude of 124.0 N.


If the crate starts from rest, how fast will it be moving after the man has pulled it a distance of 2.90 m?

  • physics - ,

    Calculate the acceleration a using
    F = M a a = F/M

    F = 178.0 cos 20 - 124.0 N

    The velocity after moving a distance X is sqrt(2aX)

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